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Low tech TVs

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Vrock
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Wed Dec 05, 2007 3:24 pm

SpotTheCat wrote:
Vrock wrote:
SpotTheCat wrote:
In my understanding of EE, you can't modulate a purely digital signal through EM waves. Neither antenna will work well because of the discontinuity of the signal.
So....how's it transported then?
like this

Apparently it uses 10% of the energy NTSC does for a given coverage area.
So the answer to this question:

Vrock wrote:
Is it a digital stream modulated into an analog carrier (like how Dolby Digital worked on Laserdisc), or is it pure digital?


is the former.
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SlyFerret
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Wed Dec 05, 2007 3:53 pm

There are of course more ways to modulate a digital signal. I think the types that my friend was trying to explain to me were QAM and QPSK.

That was a great explaination of the 8-VSB modulation.

Thanks!

-SF
"Had this been an actual emergency, we would have fled in terror, and you would not have been notified."
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